Here fam. This will downloads all the posts to text files. I'm sure you can figure it out from there

#!/usr/bin/env ruby
require "open-uri"
require "nokogiri"

body = Nokogiri::HTML(open("https://parahumans.wordpress.com/table-of-contents/"))
body.css("strong a").each do |link|
    text = []
    page =  Nokogiri::HTML(open(link["href"]))
    page.css("div[class=entry-content] p")[2..-2].each do |p|
        p.text.gsub! "<em>" ""
        text << p.text
    end
    title = page.at_css("title").text
    puts title